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Brian Mayes
Gender:  Joined: 11 Aug 2009 Posts: 24 Location: UK
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Posted: 15.07.2011, 17:59 Post subject: From Perhentian Islands, Malaysia |
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Please help me identify this species.
I found it just off Pulau Perhentian Kecil on a sandy bottom with occasional soft corals at a depth of 22m.
Anterior view with mantle
Posterior view with mantle partly retracted.
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Myosotis
Gender:  Joined: 13 May 2010 Posts: 14
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Posted: 20.07.2011, 00:54 Post subject: |
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It seems to be [i]Prionovolva wilsoniana[/i] (reference : book of Lorenz&Fehse "The Living Ovulidae").
Great dive ! |
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Brian Mayes
Gender:  Joined: 11 Aug 2009 Posts: 24 Location: UK
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Posted: 20.07.2011, 11:39 Post subject: |
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I don't think it's Prionovolva wilsoniana, because the live animal looks very different.
Image of Prionovolva wilsoniana found on spiky soft coral (Dendronephthya sp.) also in the Perhentians, Malaysia. |
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wei
Joined: 30 Jan 2009 Posts: 37
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Posted: 22.07.2011, 03:08 Post subject: |
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Hi, it looks like a Diminovula to me. Striking animal that I'm not familiar with though. Nice photos! |
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Brian Mayes
Gender:  Joined: 11 Aug 2009 Posts: 24 Location: UK
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Posted: 22.07.2011, 18:21 Post subject: |
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Thanks Wei.
I agree it does look like a Diminovula, especially with the yellow line around the shell. However, the live animal doesn't seem to match any of the Diminovula that I know or can find here http://www.flickr.com/search/?w=all&q=diminovula&m=text |
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wei
Joined: 30 Jan 2009 Posts: 37
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Posted: 23.07.2011, 07:05 Post subject: |
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That was my first impression too, but then again I haven't seen many animal photographs of this genus except those that occur around my area. |
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felix Administrator

Gender:  Joined: 25 Jan 2009 Posts: 53
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Posted: 28.07.2011, 10:04 Post subject: |
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This is Diminovula whitworthi. The mantle colour is strange though. In any case, it is a difficult group indeed... |
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Brian Mayes
Gender:  Joined: 11 Aug 2009 Posts: 24 Location: UK
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Posted: 28.07.2011, 10:27 Post subject: |
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Thanks Felix. As you say the mantle is very different to A32 in your book. Is the yellow line around the shell more an indication of D. aurantiomacula? |
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felix Administrator

Gender:  Joined: 25 Jan 2009 Posts: 53
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Posted: 29.07.2011, 16:25 Post subject: |
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well, yes, but basically aurantiomacula and whitworthi are very close, either the same, or a complex of several other species. The yellow line is sometimes apparent in the living shell but then fades rapidly in the dead shell |
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